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Bioinspired Functional Structures for Lubricant Control at Surfaces and Interfaces: Wedged-Groove with Oriented

Sangqiu Chen¹, Qingwen Dai^1,2,3, Xiaolong Yang^1,4

¹National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

ACS Applied Materials & Interfaces

|September 9, 2022

Summary

This summary is machine-generated.

This study introduces bioinspired surfaces for controlling lubricants under thermal gradients. By mimicking cactus and centipede structures, researchers achieved directional lubricant transport, enhancing machinery and microfluidic applications.

Keywords:

bioinspired capillary pattern surface and interface thermal gradient wedged groove

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Area of Science:

Surface science
Bioinspired engineering
Fluid dynamics

Background:

Lubricant control is crucial in machinery and microfluidics.
External thermal gradients pose challenges for lubricant management.
Bioinspiration offers novel solutions for surface functionalities.

Purpose of the Study:

To propose a bioinspired functional surface design for lubricant control.
To investigate the influence of geometrical parameters on lubricant manipulation.
To explore lubricant transport mechanisms under thermal gradients.

Main Methods:

Construction of a bioinspired surface with wedged-grooves and oriented capillary patterns.
Analysis of geometrical parameters affecting directional lubricant manipulation and sliding anisotropy.
Experimental observation and mechanism elucidation of lubricant self-transport.

Main Results:

A bioinspired surface design enables controllable, directional lubricant self-transport.
The orientation of the capillary pattern is key to manipulating lubricant flow.
The study reveals the underlying mechanism of lubricant transport, even with thermal gradients.

Conclusions:

The proposed bioinspired surface design offers effective lubricant control.
This design has potential applications in advanced machinery and microfluidic devices.
Bioinspired surfaces provide a promising avenue for complex fluid management.